Download manual iOS 8 and installation method :
1- Download iOS 8 firmware for iPhone/iPad/iPod Touch.
2- Open iTunes and connect your iDevice via USB cable
3- Select your device from the left navigation panel on iTunes 11
4- Hold down the Shift (Windows) or Alt/Option (Mac) key and hit the restore button on iTunes
5- Browse and select the downloaded iOS 8 IPSW file. Let the restore process complete.
Download iOS 8 Links for Apple Devices . ” Right Click ” and ” Save Target or Save as link”
- iPad Air (5th generation WiFi + Cellular)
- iPad Air (5th generation WiFi)
- iPad (4th generation CDMA)
- iPad (4th generation GSM)
- iPad (4th generation WiFi)
- iPad mini (CDMA)
- iPad mini (GSM)
- iPad mini (WiFi)
- iPad mini 2 (WiFi + Cellular)
- iPad mini 2 (WiFi)
- iPad mini 2 (CDMA)
- iPad 3 Wi-Fi (3rd generation)
- iPad 3 Wi-Fi + Cellular (model for ATT)
- iPad 3 Wi-Fi + Cellular (model for Verizon)
- iPad 2 Wi-Fi (Rev A)
- iPad 2 Wi-Fi
- iPad 2 Wi-Fi + 3G (GSM)
- iPad 2 Wi-Fi + 3G (CDMA)
- iPhone 5 (CDMA)
- iPhone 5 (GSM)
- iPhone 5c (CDMA)
- iPhone 5c (GSM)
- iPhone 5s (CDMA)
- iPhone 5s (GSM)
- iPhone 6
- iPhone 6 Plus
- iPhone 4s
- iPod touch (5th generation)
Thanks,